Unable to handle kernel NULL pointer dereference

Umaid Singh Rajpurohit (sunadm@rediffmail.com)
5 Apr 2002 07:42:51 -0000


Hello all,

we are running clearcase,sun grid engine on RedHat Linux 7.1
(kernel 2.4.2) on IBM Xseries one U servers that has
two CPU's and we mount all the files to be processed using
autofs.
Here is uname -a
Linux 2.4.2-2smp #1 SMP Sun Apr 8 20:21:34 EDT 2001 i686
unknown

I have more then sufficient physical memory and swap space
Here is some swap space detail form top

Mem: 1543868K av, 507684K used, 1036184K free, 0K shrd, 317576K
buff Swap: 5116576K av,0K used, 5116576K free 33076K cached

we are running n number of IBM X Series server every now and then
one or two servers crashes and don't allow me to do anything
except hard reset.

The /var/log/messages says something like:

Jan 6 17:59:45 kernel: Unable to handle
kernel NULL pointer
dereference at virtual address 00000014
Jan 6 17:59:45 kernel: printing eip:
Jan 6 17:59:45 kernel: f8b510b2
Jan 6 17:59:45 kernel: pgd entry eb571000:
0000000000000000
Jan 6 17:59:45 kernel: pmd entry eb571000:
0000000000000000
Jan 6 17:59:45 kernel: ... pmd not
present!
Jan 6 17:59:45 kernel: Oops: 0000
Jan 6 17:59:45 kernel: CPU: 1
Jan 6 17:59:45 kernel: EIP:
0010:[<f8b510b2>]
Jan 6 17:59:45 kernel: EFLAGS: 00010246
Jan 6 17:59:45 kernel: eax: d951f220
ebx: 00000040 ecx: c027e140
edx: 00000000
Jan 6 17:59:45 kernel: esi: 00000000
edi: ea10fe60 ebp: ea10fe20
esp: ea10fde8
Jan 6 17:59:45 kernel: ds: 0018 es: 0018
ss: 0018
Jan 6 17:59:45 kernel: Process tcsh (pid:
31185, stackpage=ea10f000)
Jan 6 17:59:45 kernel: Stack: 00000040
f68c86c4 ea10fea0 d32e2ca0
00000040 f68c86c4 ea10fea0 00000000
Jan 6 17:59:45 kernel: 00000000
00000000 f68c86c4 d951f220
00029508 00000002 ea10fe70 f8b4c6cf
Jan 6 17:59:45 kernel: 00000001
ea10fe60 d32e2ca0 f8b4c423
00000040 f68c86c4 d32e2ca0 000079d1
Jan 6 17:59:45 kernel: Call Trace:
[<f8b4c6cf>] [<f8b4c423>]
[<f8b56034>] [<f8b8a764>] [<f8b4d497>]
[<f8b754cc>] [<f8b7042a>]
Jan 6 17:59:45 kernel: [<f8b70420>]
[<f8b6fbef>] [dput+59/416]
[permission+69/144] [<f8b6ee70>]
[path_walk+2392/2432]
[__user_walk+58/96] [sys_stat64+19/112]
Jan 6 17:59:45 kernel: [<f8b70420>]
[<f8b6fbef>] [<c014e8cb>]
[<c01458a5>] [<f8b6ee70>] [<c01465f8>]
[<c0146b0a>] [<c0143143>]
Jan 6 17:59:45 kernel:
[error_code+52/60] [system_call+51/56]
Jan 6 17:59:45 kernel: [<c0109300>]
[<c01091cb>]
Jan 6 17:59:45 kernel:
Jan 6 17:59:45 kernel: Code: 83 7e 14 06
0f 85 f7 00 00 00 83 c4 f8 6a
00 56 e8 3d a8 ff
Jan 6 17:59:45 kernel: Unable to handle
kernel NULL pointer
dereference at virtual address 00000014
Jan 6 17:59:45 kernel: printing eip:
Jan 6 17:59:45 kernel: f8b510b2
Jan 6 17:59:45 kernel: pgd entry d4f8d000:
0000000000000000
Jan 6 17:59:45 kernel: pmd entry d4f8d000:
0000000000000000
Jan 6 17:59:45 kernel: ... pmd not
present!
Jan 6 17:59:45 kernel: Oops: 0000
Jan 6 17:59:45 kernel: CPU: 0
Jan 6 17:59:45 kernel: EIP:
0010:[<f8b510b2>]
Jan 6 17:59:45 kernel: EFLAGS: 00010246
Jan 6 17:59:45 kernel: eax: d951f220
ebx: 00000040 ecx: c027e140
edx: 00000000
Jan 6 17:59:45 kernel: esi: 00000000
edi: e6041e60 ebp: e6041e20
esp: e6041de8
Jan 6 17:59:45 kernel: ds: 0018 es: 0018
ss: 0018
Jan 6 17:59:45 kernel: Process tcsh (pid:
31184, stackpage=e6041000)
Jan 6 17:59:45 kernel: Stack: 00000040
f68c8ec8 e6041ea0 eca3ace0
00000040 f68c8ec8 e6041ea0 00000000
Jan 6 17:59:45 kernel: 00000000
00000000 f68c8ec8 d951f220
00029508 00000002 e6041e70 f8b4c6cf
Jan 6 17:59:45 kernel: 00000001
e6041e60 eca3ace0 f8b4c423
00000040 f68c8ec8 eca3ace0 000079d0
Jan 6 17:59:45 kernel: Call Trace:
[<f8b4c6cf>] [<f8b4c423>]
[<f8b56034>] [<f8b8a764>] [<f8b4d497>]
[<f8b754cc>] [<f8b7042a>]
Jan 6 17:59:45 kernel: [<f8b70420>]
[<f8b6fbef>] [dput+59/416]
[permission+69/144] [<f8b6ee70>]
[path_walk+2392/2432]
[__user_walk+58/96] [sys_stat64+19/112]
Jan 6 17:59:45 kernel: [<f8b70420>]
[<f8b6fbef>] [<c014e8cb>]
[<c01458a5>] [<f8b6ee70>] [<c01465f8>]
[<c0146b0a>] [<c0143143>]

I am unable to find any information on it.Can any one help me
out.If you need any other information please mail me.

Warm Regard
umaid
linux support (TI india)
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